... no more than +35°C in 24 hours.2. Altitude:no more than 2000m.3. Atmospheric conditions ... taken into consideration.4. Class of pollution: class 2.5. Installation condition: class II.6. Installation mode ... of application and the working condition before installation 2. During the process of installing pull down ... the binding screw during the connection 2Pole 63A Fire Retardant Plastic Ac Contactor Switch